Power-driven table tool with portable vertical-shaft motor



Sept- 22, 1953 E. E. GRABINSKI 2,652,863

' POWER-DRIVEN TABLE TOOL WITH PORTABLEI VERTICAL-SHAFT MOTOR 3 Sheets-Sheet l Filed May 11, 1948 E. E. GRABINSKI DRIVEN TABLE TOOL WITH PORTABLE Sept. 22, 1953 ,POWER- VERTICALLSHAFT MOTOR Filed May l1, 1948 3 Sheets-Sheet 2 Sept. 22, 1953 E. E. GRABINSKI POWER-DRIVEN TABLE TOOL WITH PORTABLE VERTICAL-SHAFT MOTOR Filed May l1, 1948 A 3 Sheets-Sheet 3 Patented Sept. 22,4195?,

UNITEDSTATES PATENT OFFICE POWER-DRTV EN TABLE TOOL WITH PORT- l yABLE VERTICAL-SHAFT MOTOR Edward E. Grabinski, chicago,- Iu. v VAmiiiicatioMay 11, 194s, seria1No.26,s6o

This invention relates to a new and improved power driven tool and has for one of its principal objects the provision of means for angularly positioning a tool with respect to a table.

An important object of this invention is to provide a power driven saw` tiltable for angular adjustment with respect to a table topv and tiltable for vertical adjustmentwith respect to the table top. y Another important object of this invention is the provision of a power driven circularsaw associated with a table and adjustable means for positioning the saw at various angles and height with respect to the table" and includingA a member for shielding the source ofpower from the saw.

A further object of this invention is to provide a portable power driven tool' arranged and constructed in such a manner as to be adaptable for use with various tools. v

A still further object of this invention is the provisionv of a portable power driven tool including a table part and clamping means adapted to conveniently clamp the table part onto a stationary support for disposition in a' horizontal plane? I l v Another and still further object of thisinvention is'to supply a portable motor such as those used for iloor sanders and adapt it for easyand eiiicient use with saws of the circular or jig type. y Still another object of this invention is to provide a portable motor driven saw including its own operating table and means mounting the motor beneath the table in a manner to permit swinging adjustment through planes at right angles to each other.

vStill a further object is the provision of a table top for portable motor driven circular saws equipped with an easily adjustable guide for movement across the table toward and away from the saw.

Another object of the invention is to provide a table top for a power-driven saw equipped with a slit-like aperture for passage of the saw tool and constructed in such a manner to vary the widthof the slit by plugging a part thereof.

Other and further important objects of this invention will become apparent from the disclosures in the following specification and accompanying drawings.

In the drawings: Y

Fig. 1 is a side elevational view'of the portable motor driven circular saw of this invention. Y Fig. 2 is a sectional view taken on the line 2-2 of Fig. 1.

v 3v claims. (C1. 14s- 36) 'Fig. 3 is a bottom plan View of the device 'as shown in Figs. 1 and 2.

Fig. 4 (Sheet 1) is an elevational view partially in section of a Vportion of the device as viewed from the line 4-4 of Fig. 1. Y

Fig. 5 is a sectional view ofthe device taken on the line 5-5 of Fig. 2. I Y

Fig. 6 (Sheet 3) is a front elevational view of the portable power driven tool arranged to operateajig saw. Y

Fig. '7 (Sheet 2) is an end view of the jigsaw device as shown in Fig. 6.

Fig. 8 (Sheet 3) is an enlarged sectional detail of the top of the jig sawof Figs. 6 and '7.

Fig. 9 (Sheet 2) is a detail of a shield and supporting plate construction. y

As shown in the drawings:

The reference numeral I0 indicates generally a support to which may be attached the portable power driven tool of this invention. The`v tool includes a table part'or table top I I which is adapted to be disposed generally horizontally.- -C' clamps I2 and I3 are attached 'to the underside of the table top II in spaced apart aligned positions and are the'means of effecting vattachment to the support IB. As' best shown in Fig. 1,*an angle iron I 4 is attached across and to the underside ofthe table top I'I by means of screws or the like I5. The C clamps I2 and I3 are provided with threaded apertures I6 and I1 in the top I8 and backv I9 respectively of the clamp. Thus the clamp may be placed as shown in Fig. 1 wherein the bolt 2B passing through the angle' member I4 engages the threaded aperture II holding the c clamp in position to engage a horizontally disposed support such as I 0. The bottom 2| of the clamp carries a-bolt member 22 with a winged head 23'for easy hand turning to grip the under-v side of the support II). When-the available fixed support is vertically disposed such asia carpenters horse, the bolt 20 is removed from the aperture I'I and the clamp is yrotated/so that the open mouth of the clamp faces downwardly and the aperture I6 is in alignment with the bolt 2G so that the C clamp-maybe ixedly held to the underside of the table top in its new positionv through the medium of the 4angle member I4.j In both instances, however, the table top` is xed' in a flat horizontal plane. v An electric motor 24 such as ordinarily ernployed 'in portable iioor Sanders is employed as the source ofv power in this power ydriven tool. A bracket 25 hasthree sides 26, 2l,l and 28 (Fig. 3) encircling a major portion ofthe ci'rcum-v ference of themotorf24. Thumb screws 29' and ing. The bracket and motor 24 are now if;

fastened together as a rigid integral unit. The bracket 25 is further provided with outwardly bent end portions 34 and 35 as best shown in Fig. 3.

The underside of the table top Il is provided with spaced, aligned brackets 36 and 31 which as shown in Fig. 2 are in the form of angle memF bers. The brackets 36 and 31 have flange memvmotor is swung about the hinge 53.

As best shown in Fig. 5, the motor 24 is provided with a driven shaft 6l. The shaft 6l carries a circular saw 62 that is held in position on the shaft by a nut 63. The saw 62 is driven by the motor and as it forms a part of the motor it is shiftably adjustable with the motor through the planes at right angles to each other. The circular blade 62 projects upwardly through a slot 64 in the table top Il. Figures 4 and 5 show the arcuate slot 65 in the plate 45 through which the motor shaft 6I may freely swing when the It is evident that as the motor is swung about hinge 53 the height of the saw 62 above the table ll varies.

A. Thus the depth of Saw cut can be varied. The

saw is shown fully extended in the full lines of Fig. 2 and is shown in its innermost position in bers 38 and 39 respectively which are bolted or otherwise attached to the' table top at 40 and 4l. The vertically disposed portions 42 and 43 of the brackets 36 and 31 are equipped with horizontally aligned arcuate slots 44. A large plate 45 is normally positioned in a generally vertical plane to one side of the motor 24. This plate has Welded to its opposite ends small brackets or plates 46 and 41. -'Ilhese small plates are parallel to and positioned closely adjacent the vertical portions of the brackets 36 and k3l. As

best shown in Fig. 3, bolts 4S, 49, 54 and 5l pass through the arcuate slots 44 and thence through spaced apertures in the small end plates 45 and 41.. The shape of the end plates 45 and 41 is best shown in Fig. 9 and is such that when the bolts 48, 49, 50 and 5l are loosened the large 5.)

plate or shield 45 may be swung about an imagi" nary pivot at 52. The bolts 48, 43, 53 and 5i guide and limit movement of the plate 45 to the extent of the arcuate slots. Certain of the bolts are equipped with winged heads for facilitating manual adjustment of the angular position .of the plate 45.

The motor bracket 25 is carried on the plate 45 by a hinging of the bracket arm 35 lat 53 (Fig. 2) and an adjustable attachment of the arm 34 at 54. The plate 45 is provided with a bracket 55. This bracket member is arcuate in shape and is attached at its ends `56 and .51 by Welding -or the like to the side wall of the plate 45. The body of the bracket is spaced outwardly -of the plate 45 and thus permits the arm 34 to slide between the bracket and the plate 4.5. The bracket has an arcuate slot 58 which is formed about the hinge center 53. A winged top bolt 59 adjustably fastens the arm 34 to the :n

bracket 55 in any desired position in the slot 58,. The motor 24 may thus be swung about the hinge 53 through the limits of the arcuate slot 58 defining a first plane. Movement of the plate 45 about the hinges in the angle brackets 35 and 31 defines a second plate substantially at right angles to the rst plane in which the motor may be swung.

The motor 24 has slots or louvers 50 in the housing for passage of air to provide cooling for the motor. A fan within motors is standard equipment to draw air in and through rmotor housings for cooling purposes. The plate 45 shields the openings 60 and prevents passage of sawdust or other` shavings created byoperation of the tool. Thus the plate 45 in addition to acting as an intermediate support for the moto-rf about which the motor lhinges in one plane, also acts as a very efficient dust shield and adds rigidity to the entire portable tool.

the dashed lines of Fig. 2.

The movement of the motor and plate 45 through the other plane dened by the swinging around the hinge 52 causes the circular saw blade to be tilted to some angle with respect to the table top I I. The saw may be locked at any desired angle and will operate to cut material at that angle by moving the material into the saw over the flat table top Il. The table remains horizontally level throughout all swing'A ing movements of the motor. I

The slot 64 may be enlarged in its width by removing a plug 65. The plug includes a ystrip E6 held at its ends S1 and 68 by attaching .straps B9 and 1.0. See Fig. 3. Screws or the like 1| attach the straps 59 and 10 to the underside of the table top Il. When the plug 65 is removed the saw may be replaced by `a wider saw or mill ing tool. Y

The table top Il is also equipped with a lat? erally adjustable guide bar 12. The .bar 1.2 comprises an inverted channel member 13 with the arms riding on the table surface. The channel member 13 is somewhat longer than the Width of the table. Clamp members 1.4 and 15 (Fig. 2) are positioned Within the channel 13 at opposite ends thereof and .have hook-like ends 16 and 11 adapted to engage the underside of the table top Il as shown in Fig. 2. The hooks 16 and 11 are drawn -up by thumb screws 18 and 19. When the screws are loosened the bar 12 may ybe moved toward or away from the saw to guide the material to be .cut .at any desired width.

Figure 3 shows that the table top Il is vsplit at 83 leaving a groove through which a mitering member may be .guided in true parallel relationship with the saw 52. The angle members 36 and act to hold Athe table parts together. A joining strip E! covers the groove '3.3 on the iun-l derside and is `fastened to the table by means of rivets or the like 82. v

Figures 6, 7 and show a modified use of the table and motor supporting Vhinged brackets.' The circular saw has been removed and in lieu thereof a jig saw 33 is mounted thereon. An eccentric 84 -1s carried by the motor shaft 6I and V causes vertical reciprocation of the jig saw through the saw slot 64 in the table top Il. The `top of the `jig saw 83 is supported by a C-shaped bracket 85. The bracket 85 is attached to the bottom of the plate 45 by `boi-lts or the like 3.3 and there; upon extends laterally outwardly and `thence. upwardly outside the outer edge of the table `top li and thence inwardly to its attachment at 31 to the jig saw. This last mentioned attachment is shown .in detail in 8. The saw 8,3 is attached to va rod .83 which yver-tends upwardly within an enclosed sleeve member 39. A piston or circular flange 90 is positioned at the top of the rod 88 and a spring 9| contained within the sleeve constantly urges the saw upwardly. Thus the saw must be pulled downwardly against the action of the spring 9|. The sleeve 89 in turn is welded at 92 to the C bracket 85. A saw guide member 93 is equipped with an adjustable sleeve top 94 with a winged set screw 95 for vertical adjustment for various thicknesses of material. Swinging movement of the plate 45 about its hinge 52 will tilt the jig saw in the same manner as the circular saw. The lower end of the saw 83 moves with the motor drive-n shaft and the upper end moves by reason oi its independent connection with the table encircling C bracket 85.

It is apparent that numerous power driven tools may be employed to advantage with this portable table and motor supporting hinged brackets. Thus many details of construction may be varied thro-ughout a wide range without departing from the principles disclosed herein and I therefore do not propose limiting the patent granted hereon otherwise than as necessitated by the appended claims.

What is claimed is:

1. A power driven tool comprising a horizontally disposed table part, said table part having an aperture therethrough, an elongated motor generally vertically disposed beneathsaid table part, said motor having a driven shaft extending outwardly from the upper end thereorn at a right angle thereto, a bracket fastened to said motor and having oppositely and laterally outwardly extending arms, spaced apart aligned vertically disposed angle brackets xedly fastened to the underside of said table part on opposite sides of said table part aperture, said angle brackets having horizontally aligned arcuate slots, a relatively wide plate normally disposed vertically beneath said table part adjacent said table part aperture and having its ends terminating one adjacent each of said angle brackets, small brackets attached to the ends of said plate and having apertures therein in alignment with the arcuate slots in the angle brackets, bolt means adjustably fastening the small brackets to the angle brackets by passing through the apertures therein, one of said motor bracket arms hinged to one end of said plate, said plate on the other end thereof having a slot therein on an arc about the bracket arm hinge as a center, means for adjustably positioning the other of said motor bracket arms in the arcuate slot in said plate, said plate having an aperture therein for the passage of said motor driven shaft, and a work tool mounted on said motor driven shaft adjacent the side of the plate opposite the motor and its bracket, said work tool adapted 'toextend upwardly through the aperture in the table part whereby hinging of the plate will angularly adjust the work tool with respect to the table part and hinging of the bracket will determine the extension of the work tool above the table part.

2. A device as set forth in claim 1 in which the work tool is a circular saw.

3. A device as set forth in claim 1 in which the work tool is a jig saw and bracket means is attached to said plate and extends around the side of the table part and supports the top of said jig saw extending through the table part aperture.

EDWARD E. GRABINSKI.

References Cited in the le of this patent UNITED STATES PATENTS Number Name Date 119,139 y Hanson Sept. 19, 1871 126,580 Sanford May 7, 1872 272,785 Showalter Feb. 20, 1883 1,081,578 Casey Dec. 16, 1913 1,314,291 Wallace Aug. 26, 1919 1,701,948 Crowe Feb. 12, 1929 1,799,215 Colby Apr. 7, 1931 1,898,956 Harvie Feb. 21, 1933 1,922,151 Boice et al. Aug. 15, 1933 1,993,219 Merrigan Mar. 5, 1935 2,106,288 Tautz Jan. 25, 1938 2,107,174 Boice Feb. 1, 1938 2,163,320 Hammond June 20, 1939 2,165,002 Ocenasek July 4, 1939 2,261,696 Ocenasek Nov. 4, 1941 2,265,335 Aumann Dec. 9', 1941 2,292,872 Eastman Aug. 11, 1942 2,371,451 Larson Mar. 13, 1945 2,374,286 Hargadon Apr. 24, 1945 2,430,161 Csencsics Nov. 4, 1947 FOREIGN PATENTS Number Country Date 8,538 Germany Feb. 24, 1880 487,758 Great Britain June 24, 1938 

